The 'o7' meme is a popular text-based emoticon used primarily in gaming communities and online forums to represent a salute. The 'o' symbolizes the head of a person, while the '7' represents an arm raised to the forehead in a formal military salute. Its origins are deeply rooted in space-themed MMOs like EVE Online and Elite Dangerous, where players used it to greet one another or acknowledge a courageous act. Over time, it transitioned into mainstream internet culture, becoming a universal sign of respect on platforms like Twitch and Reddit. It is most commonly used to bid farewell to a service that is shutting down, honor a legendary figure, or simply acknowledge a brave or selfless move by a fellow user.